Wall clock time and date at job start Sat Apr 11 2020 06:12:28 AMSOL-version 7.1 by G. D. Hawkins, D. J. Giesen, G. C. Lynch, C. C. Chambers, I. Rossi, J. W. Storer, J. Li, J. D. Thompson, P. Winget, B. J. Lynch, D. Rinaldi, D. A. Liotard, C. J. Cramer, and D. G. Truhlar Copyright 2004 by Regents of the University of Minnesota. All rights reserved. Notice: recipients of this code are asked to comply with the user agreement in Section 1 of the documentation file. ******************************************************************************* * 1SCF - SCF CALCULATION WITHOUT GEOMETRY OPTIMIZATION * - USE EF ROUTINE FOR MINIMUM SEARCH (DEFAULT) * GEO-OK - OVERRIDE INTERATOMIC DISTANCE CHECK * TLIMIT= - A TIME OF 15. SECONDS REQUESTED * CHARGE - CHARGE ON SYSTEM= -1 * AM1 - THE AM1 HAMILTONIAN TO BE USED * DEV - DEVELOPER OPTIONS ARE ALLOWED * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS USER-SPECIFIED * DIELEC - THE SOLVENT DIELECTRIC CONSTANT IS 2.06 * IOFR - THE SOLVENT INDEX OF REFRACTION IS 1.4345 * ALPHA - THE SOLVENT ALPHA IS 0.00 * BETA - THE SOLVENT BETA IS 0.00 * GAMMA - THE SOLVENT MACROSCOPIC SURFACE TENSION IS * 38.93 CAL MOL^-1 ANGSTROM^-2 * FACARB - THE FRACTION OF AROMATIC CARBONS IS 0.00 * FEHALO - THE FRACTION OF ELECTRONEGATIVE HALOGENS IS 0.00 ******************************************************************************* Atom NO. Chemical Bond length Bond angle Dihedral angle number (k) symbol (angstroms) (degrees) (degrees) (I) NA:I NB:NA:I NC:NB:NA:I NA NB NC 1 1 C 2 2 C 1.31005 * 1 3 3 C 1.50705 * 119.99699 * 2 1 4 4 C 1.53001 * 109.46662 * 120.57636 * 3 2 1 5 5 C 1.50706 * 109.54243 * 294.14587 * 4 3 2 6 6 O 1.21283 * 119.99455 * 113.61520 * 5 4 3 7 7 N 1.34775 * 120.00214 * 293.61560 * 5 4 3 8 8 C 1.46502 * 119.99841 * 353.82050 * 7 5 4 9 9 C 1.46498 * 120.00106 * 173.82479 * 7 5 4 10 10 C 1.52998 * 109.46962 * 269.99647 * 9 7 5 11 11 H 1.08998 * 109.47094 * 59.99721 * 10 9 7 12 12 O 1.42900 * 109.47469 * 300.00153 * 10 9 7 13 13 C 1.53001 * 109.47021 * 180.02562 * 10 9 7 14 14 N 1.46509 * 109.46724 * 185.00205 * 13 10 9 15 15 C 1.46495 * 120.00087 * 90.00173 * 14 13 10 16 16 C 1.36938 * 119.99743 * 270.27196 * 14 13 10 17 17 H 1.08002 * 119.99918 * 26.35743 * 16 14 13 18 18 C 1.38812 * 119.99972 * 206.35712 * 16 14 13 19 19 N 1.31623 * 119.99794 * 9.69000 * 18 16 14 20 20 Si 1.86797 * 120.00271 * 189.68753 * 18 16 14 21 21 H 1.48499 * 109.46792 * 89.99829 * 20 18 16 22 22 H 1.48494 * 109.47315 * 210.00124 * 20 18 16 23 23 H 1.48503 * 109.46965 * 330.00215 * 20 18 16 24 24 C 1.53172 * 109.54635 * 54.32263 * 4 3 2 25 25 C 1.53281 * 109.06584 * 176.84803 * 24 4 3 26 26 O 1.42897 * 109.46327 * 302.45202 * 25 24 4 27 27 C 1.42904 * 114.09905 * 61.15117 * 26 25 24 28 28 C 1.53090 * 109.41634 * 298.84601 * 27 26 25 29 29 H 1.07997 * 119.99533 * 185.11882 * 1 2 3 30 30 H 1.07990 * 119.99917 * 5.12655 * 1 2 3 31 31 H 1.07995 * 120.00171 * 180.02562 * 2 1 3 32 32 H 1.08999 * 109.47285 * 0.57986 * 3 2 1 33 33 H 1.08995 * 109.47291 * 240.57382 * 3 2 1 34 34 H 1.08999 * 109.47152 * 269.18813 * 8 7 5 35 35 H 1.08998 * 109.47226 * 29.18908 * 8 7 5 36 36 H 1.08998 * 109.47118 * 149.18543 * 8 7 5 37 37 H 1.08997 * 109.46981 * 149.99826 * 9 7 5 38 38 H 1.09000 * 109.46983 * 29.99575 * 9 7 5 39 39 H 0.96701 * 113.99507 * 300.00209 * 12 10 9 40 40 H 1.08994 * 109.47122 * 65.00577 * 13 10 9 41 41 H 1.08998 * 109.46749 * 304.99790 * 13 10 9 42 42 H 1.09001 * 109.47336 * 86.27008 * 15 14 13 43 43 H 1.08993 * 109.47279 * 206.27262 * 15 14 13 44 44 H 1.09003 * 109.47161 * 326.27638 * 15 14 13 45 45 H 0.97004 * 119.99775 * 179.97438 * 19 18 16 46 46 H 1.08998 * 109.52861 * 296.84452 * 24 4 3 47 47 H 1.09004 * 109.51931 * 57.03013 * 24 4 3 48 48 H 1.09000 * 109.46151 * 182.45077 * 25 24 4 49 49 H 1.09005 * 109.46366 * 62.45241 * 25 24 4 50 50 H 1.09003 * 109.48254 * 178.85887 * 27 26 25 51 51 H 1.09001 * 109.48852 * 58.83586 * 27 26 25 52 52 H 1.08997 * 109.51765 * 297.70092 * 28 27 26 53 53 H 1.09002 * 109.57419 * 177.54520 * 28 27 26 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 6 0.0000 0.0000 0.0000 2 6 1.3101 0.0000 0.0000 3 6 2.0635 1.3052 0.0000 4 6 2.9539 1.3799 1.2420 5 6 2.0924 1.4387 2.4771 6 8 2.0996 0.5174 3.2658 7 7 1.3141 2.5151 2.7053 8 6 1.4054 3.6843 1.8272 9 6 0.3770 2.5160 3.8313 10 6 -0.9716 1.9574 3.3728 11 1 -0.8386 0.9377 3.0116 12 8 -1.4914 2.7717 2.3199 13 6 -1.9505 1.9589 4.5487 14 7 -3.2023 1.3150 4.1427 15 6 -3.3741 -0.1290 4.3192 16 6 -4.2097 2.0623 3.5930 17 1 -3.9789 2.9795 3.0717 18 6 -5.5274 1.6407 3.7059 19 7 -5.8307 0.6336 4.4972 20 14 -6.8703 2.5028 2.7349 21 1 -7.0316 1.8389 1.4164 22 1 -8.1492 2.4292 3.4860 23 1 -6.4975 3.9257 2.5304 24 6 3.8532 0.1415 1.3030 25 6 4.7947 0.2652 2.5063 26 8 5.5588 1.4671 2.3914 27 6 4.7717 2.6598 2.3764 28 6 3.8311 2.6335 1.1689 29 1 -0.5399 -0.9316 0.0835 30 1 -0.5399 0.9315 -0.0836 31 1 1.8501 -0.9352 -0.0004 32 1 1.3552 2.1336 0.0104 33 1 2.6824 1.3674 -0.8950 34 1 2.1460 4.3792 2.2232 35 1 1.7033 3.3661 0.8282 36 1 0.4347 4.1776 1.7770 37 1 0.2440 3.5358 4.1925 38 1 0.7735 1.8948 4.6344 39 1 -1.6351 3.6945 2.5707 40 1 -2.1521 2.9862 4.8522 41 1 -1.5149 1.4117 5.3847 42 1 -3.7415 -0.3310 5.3254 43 1 -4.0921 -0.5015 3.5887 44 1 -2.4164 -0.6292 4.1751 45 1 -6.7516 0.3393 4.5764 46 1 3.2371 -0.7513 1.4101 47 1 4.4404 0.0722 0.3873 48 1 5.4672 -0.5922 2.5309 49 1 4.2083 0.2936 3.4248 50 1 5.4278 3.5275 2.3073 51 1 4.1850 2.7199 3.2930 52 1 4.4178 2.6145 0.2505 53 1 3.1989 3.5215 1.1790 RHF calculation, no. of doubly occupied orbitals= 66 REFERENCES FOR PARAMETERS IN GAS-PHASE HAMILTONIAN: H: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) C: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) N: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) O: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985) Si: (AM1): M.J.S.DEWAR, C. JIE, ORGANOMETALLICS, 6, 1486-1490 (1987). REFERENCE FOR CHARGE MODEL 2: J. Li, J. Xing, C. J. Cramer, and D. G. Truhlar, J. Chem. Phys. 111 (1999) 885. REFERENCE FOR THE PARAMETERIZATION OF THE SM5.42R SOLVATION MODEL: J. Li, T. Zhu, G. D. Hawkins, P. Winget, D. A. Liotard, C. J. Cramer, and D. G. Truhlar, Theor. Chem. Acc. 103 (1999) 9-63 P. Winget, J. D. Thompson C. J. Cramer,and D. G. Truhlar, J. Phys. Chem. B. submitted. CHARGE=-1 AM1 1SCF TLIMIT=15 GEO-OK SM5.42R & SOLVNT=GENORG IOFR=1.4345 ALPHA=0.00 BETA=0.00 GAMMA=38.93 & DIELEC=2.06 FACARB=0.00 FEHALO=0.00 DEV ZINC001677178222.mol2 53 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Sat Apr 11 2020 06:12:28 Heat of formation + Delta-G solvation = -64.880516 kcal Electronic energy + Delta-G solvation = -32903.164006 eV Core-core repulsion = 28777.388317 eV Total energy + Delta-G solvation = -4125.775689 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.96 seconds Orbital eigenvalues (eV) -41.40907 -38.56997 -37.30935 -36.18148 -35.38740 -34.49722 -32.92256 -31.47248 -31.19072 -29.63203 -27.86794 -27.15075 -26.03112 -25.58529 -23.93748 -23.45481 -22.41234 -21.16882 -20.48424 -19.75526 -18.86333 -16.88270 -16.60630 -16.55794 -16.24317 -16.03356 -15.94931 -15.28233 -15.07313 -14.91343 -14.66800 -14.43296 -14.23790 -13.84579 -13.73826 -13.38464 -13.33022 -13.11775 -12.81795 -12.66117 -12.60602 -12.26435 -11.97879 -11.86999 -11.58904 -11.52969 -11.45376 -11.26574 -11.05905 -10.85623 -10.66495 -10.62310 -10.53754 -10.38154 -10.32875 -9.98135 -9.91168 -9.78542 -9.66005 -9.49463 -9.15838 -8.56893 -8.33410 -6.60029 -5.68291 -3.14909 2.35307 2.63591 2.99952 3.40642 3.46562 3.47743 3.71674 4.20172 4.29335 4.52818 4.54817 4.74338 4.76780 4.83138 4.94120 4.98834 5.09726 5.12394 5.17276 5.28350 5.32165 5.34373 5.35042 5.43828 5.48382 5.49199 5.54623 5.58825 5.65349 5.71966 5.81330 5.88021 5.89700 5.91276 5.98381 6.00705 6.08009 6.09880 6.47412 6.58950 6.72517 6.78044 6.82734 6.88001 7.03269 7.38606 7.42143 7.73431 7.88304 8.19530 8.24729 8.49020 9.29450 9.91405 10.42982 11.38695 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.019147 B = 0.003058 C = 0.003021 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1461.984382 B = 9154.675570 C = 9265.282366 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.163 4.163 2 C -0.175 4.175 3 C -0.083 4.083 4 C -0.071 4.071 5 C 0.528 3.472 6 O -0.536 6.536 7 N -0.601 5.601 8 C 0.062 3.938 9 C 0.081 3.919 10 C 0.075 3.925 11 H 0.090 0.910 12 O -0.543 6.543 13 C 0.125 3.875 14 N -0.591 5.591 15 C 0.163 3.837 16 C -0.240 4.240 17 H 0.068 0.932 18 C -0.002 4.002 19 N -0.911 5.911 20 Si 0.905 3.095 21 H -0.289 1.289 22 H -0.293 1.293 23 H -0.280 1.280 24 C -0.128 4.128 25 C 0.051 3.949 26 O -0.385 6.385 27 C 0.061 3.939 28 C -0.174 4.174 29 H 0.097 0.903 30 H 0.101 0.899 31 H 0.107 0.893 32 H 0.082 0.918 33 H 0.079 0.921 34 H 0.054 0.946 35 H 0.086 0.914 36 H 0.078 0.922 37 H 0.075 0.925 38 H 0.088 0.912 39 H 0.358 0.642 40 H 0.049 0.951 41 H 0.042 0.958 42 H 0.018 0.982 43 H 0.054 0.946 44 H -0.009 1.009 45 H 0.251 0.749 46 H 0.085 0.915 47 H 0.074 0.926 48 H 0.091 0.909 49 H 0.070 0.930 50 H 0.094 0.906 51 H 0.047 0.953 52 H 0.082 0.918 53 H 0.101 0.899 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 21.373 5.493 -7.780 23.399 Note: The Mulliken population analysis charges presented below were not used in the solvation calculation but are provided for completeness. The chosen solvation model uses CM2 partial charges for calculating solvation energies. Net atomic charges, atomic populations, and dipole contributions using Mulliken population analysis Atom NO. Type Charge No. of electrons 1 C -0.200 4.200 2 C -0.193 4.193 3 C -0.120 4.120 4 C -0.074 4.074 5 C 0.316 3.684 6 O -0.413 6.413 7 N -0.333 5.333 8 C -0.080 4.080 9 C -0.043 4.043 10 C 0.012 3.988 11 H 0.108 0.892 12 O -0.347 6.347 13 C -0.004 4.004 14 N -0.313 5.313 15 C 0.018 3.982 16 C -0.370 4.370 17 H 0.086 0.914 18 C -0.200 4.200 19 N -0.557 5.557 20 Si 0.736 3.264 21 H -0.216 1.216 22 H -0.219 1.219 23 H -0.206 1.206 24 C -0.166 4.166 25 C -0.025 4.025 26 O -0.304 6.304 27 C -0.016 4.016 28 C -0.211 4.211 29 H 0.115 0.885 30 H 0.120 0.880 31 H 0.125 0.875 32 H 0.100 0.900 33 H 0.097 0.903 34 H 0.072 0.928 35 H 0.104 0.896 36 H 0.096 0.904 37 H 0.093 0.907 38 H 0.106 0.894 39 H 0.204 0.796 40 H 0.067 0.933 41 H 0.061 0.939 42 H 0.036 0.964 43 H 0.073 0.927 44 H 0.010 0.990 45 H 0.061 0.939 46 H 0.104 0.896 47 H 0.093 0.907 48 H 0.109 0.891 49 H 0.089 0.911 50 H 0.112 0.888 51 H 0.065 0.935 52 H 0.100 0.900 53 H 0.119 0.881 Dipole moment (debyes) X Y Z Total from point charges 21.408 4.350 -7.634 23.141 hybrid contribution -1.270 0.846 -0.203 1.539 sum 20.138 5.196 -7.837 22.225 Atomic orbital electron populations 1.23968 0.95758 1.02587 0.97700 1.22733 0.95950 0.97710 1.02935 1.20917 0.98170 0.97073 0.95870 1.20801 0.95045 0.97451 0.94084 1.20339 0.79627 0.81729 0.86693 1.90654 1.66427 1.36797 1.47380 1.47613 1.39372 1.16082 1.30270 1.22382 1.02654 0.88085 0.94899 1.22357 0.90667 1.02168 0.89058 1.23186 0.89964 0.94776 0.90910 0.89159 1.86624 1.86760 1.23176 1.38106 1.21310 0.88165 0.97537 0.93370 1.43692 1.12078 1.03636 1.71895 1.20755 0.94677 0.82726 0.99992 1.19173 0.85191 1.05694 1.26954 0.91418 1.25107 0.97382 0.98855 0.98625 1.70056 1.17635 1.29138 1.38863 0.86241 0.81593 0.79134 0.79434 1.21640 1.21928 1.20573 1.22090 0.97476 0.97463 0.99572 1.22821 0.94441 0.86923 0.98342 1.87889 1.33812 1.14100 1.94589 1.22524 0.94203 0.88256 0.96611 1.22950 0.99062 0.98382 1.00718 0.88511 0.88024 0.87511 0.89953 0.90307 0.92805 0.89551 0.90364 0.90656 0.89368 0.79631 0.93256 0.93929 0.96355 0.92722 0.99036 0.93873 0.89640 0.90697 0.89073 0.91134 0.88757 0.93459 0.89963 0.88073 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. Note: The number of geometries may not correspond to the number of cycles due to rejected geometry changes. In the following table subtotal= G_P + SS G_CDS. Atom Chem. CM2 G_P Area Sigma k SS G_CDS Subtotal M number symbol chg. (kcal) (Ang**2) cal/(Ang**2) (kcal) (kcal) value 1 C -0.16 -2.23 14.32 29.01 0.42 -1.82 16 2 C -0.18 -2.09 8.12 -36.03 -0.29 -2.38 16 3 C -0.08 -0.82 4.45 -27.88 -0.12 -0.95 16 4 C -0.07 -0.73 0.28 -155.48 -0.04 -0.78 16 5 C 0.53 7.05 4.50 -10.98 -0.05 7.00 16 6 O -0.54 -9.06 13.66 5.56 0.08 -8.99 16 7 N -0.60 -7.20 2.80 -181.57 -0.51 -7.70 16 8 C 0.06 0.53 8.06 59.85 0.48 1.01 16 9 C 0.08 1.08 5.15 -4.04 -0.02 1.06 16 10 C 0.07 1.27 3.48 -26.73 -0.09 1.18 16 11 H 0.09 1.85 8.14 -51.93 -0.42 1.43 16 12 O -0.54 -9.14 11.19 -35.23 -0.39 -9.54 16 13 C 0.13 2.49 5.37 -4.04 -0.02 2.46 16 14 N -0.59 -14.90 2.89 -181.12 -0.52 -15.43 16 15 C 0.16 4.19 8.99 59.84 0.54 4.73 16 16 C -0.24 -6.54 9.20 -15.06 -0.14 -6.68 16 17 H 0.07 1.78 7.46 -52.49 -0.39 1.39 16 18 C 0.00 -0.06 5.10 -17.43 -0.09 -0.15 16 19 N -0.91 -27.03 10.81 55.49 0.60 -26.43 16 20 Si 0.91 22.09 29.56 -169.99 -5.03 17.07 16 21 H -0.29 -7.11 7.11 56.52 0.40 -6.71 16 22 H -0.29 -7.22 7.11 56.52 0.40 -6.82 16 23 H -0.28 -6.60 7.11 56.52 0.40 -6.20 16 24 C -0.13 -1.36 4.09 -26.50 -0.11 -1.47 16 25 C 0.05 0.58 6.56 37.30 0.24 0.83 16 26 O -0.39 -4.49 10.77 -35.23 -0.38 -4.87 16 27 C 0.06 0.58 6.62 37.20 0.25 0.82 16 28 C -0.17 -1.42 4.48 -26.60 -0.12 -1.54 16 29 H 0.10 1.34 8.06 -52.49 -0.42 0.92 16 30 H 0.10 1.49 7.84 -52.49 -0.41 1.08 16 31 H 0.11 1.21 6.95 -52.49 -0.37 0.84 16 32 H 0.08 0.82 5.07 -51.93 -0.26 0.56 16 33 H 0.08 0.64 8.14 -51.93 -0.42 0.21 16 34 H 0.05 0.36 7.31 -51.93 -0.38 -0.02 16 35 H 0.09 0.66 3.14 -51.93 -0.16 0.50 16 36 H 0.08 0.66 6.87 -51.93 -0.36 0.30 16 37 H 0.08 0.83 8.07 -51.93 -0.42 0.41 16 38 H 0.09 1.30 7.35 -51.93 -0.38 0.92 16 39 H 0.36 4.94 8.79 45.56 0.40 5.34 16 40 H 0.05 0.94 8.04 -51.93 -0.42 0.52 16 41 H 0.04 0.82 8.07 -51.93 -0.42 0.40 16 42 H 0.02 0.49 7.78 -51.93 -0.40 0.09 16 43 H 0.05 1.52 6.88 -51.93 -0.36 1.16 16 44 H -0.01 -0.21 8.10 -51.93 -0.42 -0.63 16 45 H 0.25 7.24 8.31 -40.82 -0.34 6.90 16 46 H 0.09 1.00 6.45 -51.93 -0.33 0.67 16 47 H 0.07 0.69 8.14 -51.93 -0.42 0.27 16 48 H 0.09 0.90 8.14 -51.93 -0.42 0.48 16 49 H 0.07 0.96 6.05 -51.93 -0.31 0.65 16 50 H 0.09 0.70 8.14 -51.93 -0.42 0.27 16 51 H 0.05 0.51 7.38 -51.93 -0.38 0.12 16 52 H 0.08 0.60 8.14 -51.93 -0.42 0.17 16 53 H 0.10 0.67 3.55 -51.93 -0.18 0.49 16 LS Contribution 398.16 15.07 6.00 6.00 Total: -1.00 -33.47 398.16 -7.39 -40.86 By element: Atomic # 1 Polarization: 13.77 SS G_CDS: -8.06 Total: 5.71 kcal Atomic # 6 Polarization: 2.50 SS G_CDS: 0.83 Total: 3.33 kcal Atomic # 7 Polarization: -49.13 SS G_CDS: -0.43 Total: -49.57 kcal Atomic # 8 Polarization: -22.70 SS G_CDS: -0.70 Total: -23.40 kcal Atomic # 14 Polarization: 22.09 SS G_CDS: -5.03 Total: 17.07 kcal Total LS contribution 6.00 Total: 6.00 kcal Total: -33.47 -7.39 -40.86 kcal The number of atoms in the molecule is 53 The average number of expansion shells was 16.00 The maximum number of expansion shells was 16 The minimum number of expansion shells was 16 **** NOTA BENE **** This is the net solvation energy for this exact molecular structure (nuclear and electronic)! The standard-state solvation energy should be obtained as the difference between the heat of formation plus delta-G solvation for the relaxed solvated system and that for the relaxed gas-phase system. ZINC001677178222.mol2 53 1SCF run This is a breakdown of the solvation energy calculated without geometric relaxation in solution: (1) E-EN(sol) electronic-nuclear energy of solute -24.020 kcal (2) G-P(sol) polarization free energy of solvation -33.470 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -57.491 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -7.390 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.860 kcal (6) G-S(sol) free energy of system = (1) + (5) -64.881 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.96 seconds